17. e2f3 [%c_effect f3;square;f3;type;GreatFind;persistent;true] Normally this capture isn't desirable for White, but here the e-file and the better development justify this move. 17... e8e1 [%c_effect e1;square;e1;type;Inaccuracy;persistent;true] 18. c1e1  18... g4f6 [%c_effect f6;square;f6;type;Mistake;persistent;true] This move is just losing. 19. e1e7 [%c_effect e7;square;e7;type;GreatFind;persistent;true] The queen's invasion is decisive.